Insulator



FIG. 1 is a top perspective view of an insulator;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a left side elevational view thereof;

FIG. 8 is a cross-sectional view taken along line 8-8 of FIG. 6;

FIG. 9 is a bottom perspective view thereof;

FIG. 10 shows a pair of substantially identical insulators as in FIG. 1 arranged to provide an encompassing insulator housing; and,

FIG. 11 is a cross-sectional view taken along line 11-11 of FIG. 10.

The broken lines depict portions of the insulator that form no part of the claimed design. The broken lines showing a base (or second insulator) in FIGS. 10 and 11 depict environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for an insulator, as shown. 